Two problems related to radiator have been reported for the 2011 Ford F-150. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Ford F-150 based on all problems reported for the 2011 F-150.
There are @ hoses that come out of the radiator and go into a hard plastic t-piece (part number dr3z-8566-a) and there are o-rings inside of it. Mine started leaking and I was informed that I had to replace the whole piece no big deal. Then the dealer ship went on to tell me that they have replaced 6 in the last 2 weeks of the same exact year and model. The dealer ship is in lima ohio. That being said if there are so many of these that are going bad and the vehicle only being 5 years old I feel like there is obviously a defect in the part/ design of it that causes it to fail.
I would like to add to the complaints of the eco-boost. I was going about 75 mph on interstate in alabama. Floored it to pass and engine went dead. Check engine light came on. Coasted to shoulder of highway and it started to sputter and was able to get to gas station on exit about 200 yds away. Turned off engine for about 10 min. Got back on highway(with engine light off ) and was able to make it back home in east texas. Took to Ford dealership to get looked at. They put on some plate on the turbo cooling radiator. Last month, took it up to iowa. Coming back, it did it again in tulsa ok. This time engine light on all the way home. Took to dealership, they said a 3 pronged cable, the prongs broke, going to one of the turbos.